<style>
        *{
            padding: 0;
            margin: 0;
        }
        dl{
            position: fixed;
            background-color: rgba(197, 255, 236, 0.5);
            text-align: center;
            padding: 100px 30px 0 30px;
            width: 160px;
            height: 90%;
            top: 40px;
            box-sizing: border-box;
            border: 1px solid #666;
        }
        dl dt,dl dd{
            line-height: 50px;
            font-size: 16px;
        }
        a,a:visited{
            color: #8b1c4c;
            text-decoration: none;
        }
        html,body{
            height: 100%;
            width: 100%;
            overflow: hidden;
        }
        iframe{
            height: calc(100% - 115px);
            width: 100%;
            margin-left: 60px;
        }
        footer{
            background-color: #0a6999;
            margin-top: 0;
            line-height: 40px;
            color: #ccc;
        }
    </style>
<nav class="navbar navbar-inverse" role="navigation">
    <div class="container">
        <div class="navbar-header">
            <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-ex1-collapse">
                <!-- sr-only 用于提升可访问性（accessibility），它的含义是 screen reader only（仅提供给屏幕阅读器使用） -->
                <span class="sr-only">Toggle navigation</span>
                <span class="icon-bar"></span>
                <span class="icon-bar"></span>
                <span class="icon-bar"></span>
            </button>
            <a class="navbar-brand" href="#">管理页</a>
        </div>

        <!-- 这个元素在移动设备中将被折叠起来 -->
        <div class="collapse navbar-collapse navbar-ex1-collapse">
            <ul class="nav navbar-nav">
                <li class="active hidden-sm"><a href="#">公司简介</a></li>
                <li class="hidden-sm hidden-md"><a href="#">新品出炉</a></li>
                <li class="hidden-sm hidden-md"><a href="#">产品介绍</a></li>
            </ul>
            <form id="form_s" class="navbar-form navbar-left" role="search">
                <div class="form-group">
                    <input type="text" class="form-control" placeholder="Search">
                </div>
                <button type="submit" class="btn btn-default">Submit</button>
            </form>
            <ul class="nav navbar-nav navbar-right">
                <li><a href="#">欢迎你<%=nc%></a></li>
                <li><a href="/manage/logout">注销</a></li>
            </ul>
        </div>
    </div>
</nav>
<dl>
    <dt>数据处理</dt>
    <dd><a href="/manage/edit" target="main">商品管理</a></dd>
    <dd><a href="/manage/use" target="main">用户管理</a></dd>
    <dd><a href="/manage/changePassword" target="main">公告管理</a></dd>
</dl>
<iframe src="/manage/edit" name="main" frameborder="0"></iframe>
<footer class="footer navbar-fixed-bottom text-center">
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</footer>
